Tooth Sensitivity After Dental Filling: Is It Normal?

Re-filling a tooth may cause sensitivity?

Hello, doctor.
Today I went to my regular dentist for a check-up, and the doctor helped me with a dental filling.
I have a few questions: 1.
The tooth that was filled had undergone root canal treatment previously, but during the filling process today, the resin that was previously placed was ground down, and I experienced some sensitivity and discomfort during the re-filling.
Is this normal? 2.
After the filling, I occasionally feel a slight sensitivity when biting down, but I do not experience this sensation while eating.
When I try to pinpoint the angle that causes the sensitivity by biting down a few times, I sometimes do not feel any discomfort.
Is this situation normal?

Yu, 20~29 year old female. Ask Date: 2016/09/24

Dr. Zeng Guanghui reply Dentistry

1.
If a tooth that has already undergone root canal treatment is refilled with resin and does not cause sensitivity, it may be due to other issues.
It is advisable to consult a dentist for further examination.
2.
If the filling is in place but occasionally causes slight sensitivity when biting, while at other times it does not, it may indicate that the tooth structure itself has cracks.
It is recommended to seek further evaluation from a dentist.

Reply Date: 2016/09/24

More Info

Tooth sensitivity after a dental filling can be a common experience, especially if the tooth has undergone previous treatments such as root canal therapy. Let's break down your concerns regarding the sensitivity and discomfort you are experiencing after your recent dental filling.

1. Sensitivity After Filling: It is not unusual to experience some level of discomfort or sensitivity after a dental filling, particularly if the tooth had previously undergone root canal treatment. During the filling process, the dentist may need to remove old filling material, which can sometimes expose the underlying dentin or even the nerve endings in the tooth. This exposure can lead to temporary sensitivity, especially to temperature changes or pressure. If the tooth was previously treated with a root canal, the nerve inside the tooth has been removed, but the surrounding tissues can still be sensitive to touch or pressure. This sensitivity should gradually subside over time as the tooth adjusts to the new filling.

2. Occasional Pain When Biting: The occasional mild pain when biting down can also be a normal response after a filling. It is possible that the filling is slightly high, meaning it is making contact with the opposing tooth before the rest of the teeth do, which can create discomfort. This is often referred to as "bite adjustment." If you notice that the pain occurs only when biting at certain angles, it may indicate that the filling needs to be adjusted to ensure even contact with the opposing teeth. It is important to communicate this to your dentist, as they can make the necessary adjustments to alleviate the discomfort.

Additional Considerations:
- Duration of Sensitivity: Sensitivity after a filling can last from a few days to a couple of weeks. If the sensitivity persists beyond this timeframe or worsens, it is advisable to return to your dentist for a follow-up evaluation. Persistent sensitivity may indicate that the filling is too high or that there may be other underlying issues, such as a crack in the tooth or an incomplete root canal.

- Post-Operative Care: After a filling, it is essential to maintain good oral hygiene to prevent further complications. This includes brushing gently around the filled area and using a soft-bristled toothbrush. If you were advised to use a desensitizing toothpaste, continue to do so as it can help reduce sensitivity over time.

- Signs of Complications: Be vigilant for any signs of complications, such as increased pain, swelling, or changes in the color of the tooth. If you experience any of these symptoms, it is crucial to seek dental care promptly.

In summary, while some sensitivity and discomfort after a dental filling can be normal, it is essential to monitor your symptoms and communicate with your dentist about any concerns. They can provide the best guidance tailored to your specific situation and ensure that your dental health is maintained. If the sensitivity continues or worsens, do not hesitate to schedule a follow-up appointment for further evaluation and necessary adjustments.

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